Flameout power-off protection device and vegetable oil fuel stove

Abstract

The flameout power-off protection device comprises a valve body, an electromagnetic valve coil, a magnetic attraction piece, a thermocouple, a first electric contact, a second electric contact, an elastic reset piece and an electric push rod, the electromagnetic valve coil is arranged on the valve body, and the thermocouple is connected with the electromagnetic valve coil; the magnetic attraction part is arranged on the valve body in a sliding mode, the first electric contact is arranged on the magnetic attraction part, the second electric contact is arranged on the valve body or an electromagnetic valve coil, and the first electric contact and the second electric contact are connected with the two ends of the control circuit respectively. The telescopic end of the electric push rod is used for pushing the magnetic attraction piece to move so that the first electric contact can make conductive contact with the second electric contact, and then the control circuit is switched on. The elastic reset piece is arranged between the valve body and the magnetic attraction piece so that the first electric contact can be separated from the second electric contact, and then the control circuit is cut off. After accidental flameout, fuel supply and power supply can be cut off at the same time, the service life of electric equipment is prolonged, and the safety of electricity utilization can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flameout protection device, especially to a flameout power-off protection device and a vegetable oil fuel stove. BACKGROUND

[0002] The gas stove is a kind of heating equipment with gas as fuel. Since the gas generally contains carbon monoxide, methane and other toxic gases, once leakage occurs in the use process, it is easy to cause casualties. Therefore, in order to improve the safety of use, the current gas stove is generally provided with a flameout protection device, which can automatically and quickly block the continuous output of gas when the flame is accidentally extinguished, thereby protecting the personal safety of the user. The existing flameout protection device usually uses a thermocouple to detect the temperature of the combustion chamber. When the flame burns, the thermocouple generates current under heat to make the solenoid valve coil generate a magnetic field, thereby attracting the sealing plug head, which can continuously open the fuel passage in the valve body, thereby continuously supplying gas to the spray head for combustion. When the flame is extinguished, the temperature of the combustion chamber decreases rapidly, the thermocouple current disappears, and the magnetic field of the solenoid valve coil disappears. At this time, the sealing plug head is pushed open by the spring and reopens the fuel passage in the valve body, thereby directly blocking the gas supply to the spray head, avoiding the direct discharge of unburned gas.

[0003] However, since the existing flameout protection device directly blocks the fuel passage, it cannot power off the related circuit system or electrical equipment, so the existing flameout protection device will still be in an idle working state after the flameout and gas cutoff, which not only wastes power but also shortens the service life of the equipment, and also brings potential safety hazards of electricity use, so the safety of use is not high. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a flameout power-off protection device that can cut off power supply after accidental flameout, prolong the service life of electrical equipment and improve the safety of electricity use.

[0005] Another purpose of the utility model is to provide a vegetable oil fuel stove that can cut off fuel supply and power supply after accidental flameout, prolong the service life of electrical equipment and improve the safety of electricity use.

[0006] In order to achieve the above object, the utility model provides a flameout power -off protection device for cutting off control circuit, it includes valve body, solenoid valve coil, magnetic attraction piece, thermocouple, first electric contact, second electric contact, elastic reset piece and electric push rod, the solenenoide valve coil is arranged in the valve body, one end of the thermocouple is temperature sensing probe, the other end of the thermocouple is electrically connected to the solenenoide valve coil;The magnetic attraction piece is slidably arranged in the valve body, the first electric contact is arranged in the magnetic attraction piece, the second electric contact is arranged in the valve body or solenenoide valve coil, the first electric contact and second electric contact are connected with the both ends of the control circuit respectively;The telescopic end of the electric push rod is opposite to the magnetic attraction piece, to push the magnetic attraction piece and make the first electric contact with the second electric contact conductive contact, and then connect the control circuit;The elastic reset piece is arranged between the valve body and the magnetic attraction piece, to make the first electric contact with the second electric contact separate, and then cut off the control circuit.

[0007] The utility model discloses a solenenoide valve coil is arranged in the valve body, and the magnetic attraction piece is slidably arranged in the valve body, and also through setting thermocouple, make one end of thermocouple be used to detect temperature, to can use thermocouple to make the solenenoide valve coil produce the magnetic field of attracting the magnetic attraction piece;First electric contact and second electric contact are arranged on the magnetic attraction piece and the solenenoide valve coil or valve body, make the first electric contact with second electric contact and control circuit connection, thus, when starting, use the electric push rod to push the magnetic attraction piece and make the first electric contact and second electric contact contact, to can make the control circuit connect, reach the purpose of using control circuit ignition and control fuel delivery.When the thermocouple is heated and generates current, the magnetic attraction piece is attracted by the solenenoide valve coil and makes the first electric contact and second electric contact keep contact, at this moment, can make the control circuit connect continuously, make the flame continue to burn. Conversely, when the flame is extinguished accidentally, the thermocouple is cooled, and the magnetic attraction piece is pushed away from the solenenoide valve coil by using the elastic reset piece, so that the first electric contact and second electric contact are separated, and the control circuit is cut off. Thus, the scheme can automatically disconnect the power supply after accidental flameout, prevent the electrical equipment from continuing to work, effectively prolong the service life of the electrical equipment, and improve the safety of electricity.

[0008] Preferably, the flame-out power-off protection device further comprises an execution circuit electrically connected with the electric push rod, and the execution circuit comprises a time relay which controls the on-off time of the execution circuit; and when the execution circuit is powered off, the telescopic end of the electric push rod is away from the magnetic attraction element. By arranging the time relay, the on time of the electric push rod can be controlled, so that after the power is turned off, the magnetic attraction element is only subjected to the magnetic attraction force of the electromagnetic valve coil and the elastic restoring force of the elastic reset element, and thus when the fire is extinguished, the magnetic attraction force disappears, and the elastic force of the elastic reset element can be used to cut off the control circuit.

[0009] Preferably, the flame-out power-off protection device further comprises a sensing wire arranged in the combustion zone and connected with the temperature sensing probe of the thermocouple. By arranging the sensing wire, the sensitivity of the temperature sensing probe to the flame is higher, the detection capability is stronger, and the operation is more stable, so that the judgment of the extinguished fire is more accurate.

[0010] In particular, the sensing wire is arranged in a vortex structure around the combustion zone. Since the flame may swing during combustion, the detection range of the temperature sensing probe is limited, which may affect the detection result. Therefore, by arranging the sensing wire in a vortex structure, the detection range of the temperature sensing probe can be further increased to ensure the detection accuracy.

[0011] In particular, the sensing wire is a spiral spring. In this way, sufficient elastic space can be provided when the sensing wire is wound in a vortex, the installation is more flexible, the extension length is greater, and the service life is longer.

[0012] In particular, the sensing wire is made of nickel or nickel alloy material.

[0013] A plant oil fuel stove comprises a stove body, a fuel tank, a fuel channel, a nozzle, an igniter, a control circuit, an electromagnetic valve switch and a flame-out power-off protection device arranged on the stove body. The stove body is provided with a furnace body, the nozzle is arranged at the bottom of the furnace body, one end of the nozzle is connected with the fuel channel, and the other end of the fuel channel is connected with the fuel tank. The fuel tank is arranged on the stove body, the igniter is arranged on one side of the furnace body and close to the nozzle, the igniter is electrically connected with the control circuit, the electromagnetic valve switch is arranged on the fuel channel to control the on-off of the fuel channel, the electromagnetic valve switch is electrically connected with the control circuit, the flame-out power-off protection device is arranged on the control circuit, and the temperature sensing probe of the thermocouple is arranged in the furnace body and close to the nozzle.

[0014] Preferably, the plant oil fuel stove further comprises a flow control valve arranged on the fuel channel and electrically connected with the control circuit.

[0015] Preferably, the plant oil fuel stove further comprises a gas supply device, an output end of the gas supply device being communicated with the nozzle to blow the fuel in the nozzle out. The gas supply device comprises a gas pump, an output end of the gas pump being communicated with the gas port of the nozzle. In this way, the fuel can be mixed with air, so that the fuel sprayed from the nozzle can be more easily combusted.

[0016] Preferably, the horizontal height of the fuel tank is greater than the horizontal height of the nozzle. In this way, the fuel liquid in the fuel tank can automatically flow to the nozzle under the action of gravity, without using a pump to provide output power for the fuel. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural diagram of the plant oil fuel stove of the present application.

[0018] Figure 2 is a structural diagram of the stove body of the plant oil fuel stove of the present application.

[0019] Figure 3 is a structural diagram of the flameout and power-off protection device of the plant oil fuel stove of the present application.

[0020] Figure 4 is a structural diagram of the furnace body of the plant oil fuel stove of the present application. DETAILED DESCRIPTION

[0021] To make the technical content, structural features and effects of the present application clear, the following will be described in detail in combination with the embodiments and the accompanying drawings.

[0022] As Figures 1 to 4The utility model discloses a plant oil fuel range 100, including stove 1 and setting up on stove 1 fuel tank 2, fuel passage 3, shower nozzle 4, igniter 5, control circuit 6, electromagnetic valve switch 7 and flameout power-off protection device 8, stove 1 is equipped with furnace body 11, furnace body 11 is located stove 1's surface and is recessed structure to the down, forms a upper side opening space, and the opening top can be used for carrying the stove. Shower nozzle 4 sets up in furnace body 11's bottom intermediate position. Shower nozzle 4 is connected with one end of fuel passage 3, and the other end of fuel passage 3 is connected with fuel tank 2, to output liquid fuel to shower nozzle 4. The utility model discloses the fuel is plant oil fuel. Fuel tank 2 sets up in stove 1, fuel tank 2 has oil filler port 21, and oil filler port 21 sets up stove 1's surface. The horizontal height of fuel tank 2 is greater than the horizontal height of shower nozzle 4. This can make fuel liquid in fuel tank 2 can flow to shower nozzle 4 under the action of gravity automatically, need not to use pump body to provide output power for fuel. Igniter 5 sets up in one side inside furnace body 11 and is close to shower nozzle 4, and igniter 5 is electrically connected with control circuit 6. Electromagnetic valve switch 7 sets up on fuel passage 3 to control fuel passage 3 on-off, and electromagnetic valve switch 7 is electrically connected with control circuit 6, when control circuit 6 is powered on, electromagnetic valve switch 7 is opened to open fuel passage 3, so that fuel can be transported to shower nozzle 4, when control circuit 6 is powered off, electromagnetic valve switch 7 is closed to close fuel passage 3, so that fuel pauses to shower nozzle 4 delivery. Flameout power-off protection device 8 sets up on control circuit 6, and the temperature sensing probe 841 of flameout power-off protection device 8 sets up in furnace body 11 and is close to shower nozzle 4, to can detect the flame near shower nozzle 4 control circuit 6's on-off. Specifically, when flameout power-off protection device 8 detects that there is flame burning in furnace body 11, flameout power-off protection device 8 controls control circuit 6 to keep powered on, when flameout power-off protection device 8 detects that the flame in furnace body 11 is extinguished, flameout power-off protection device 8 powers off control circuit 6. More specifically, as follows:

[0023] Please refer to Figure 3As shown, the flameout power-off protection device 8 comprises a valve body 81, an electromagnetic valve coil 82, a magnetic attraction member 83, a thermocouple 84, a first electric contact 85, a second electric contact 86, an elastic reset member 87 and an electric push rod 88. The electromagnetic valve coil 82 is arranged on the valve body 81. One end of the thermocouple 84 is a temperature sensing probe 841, and the other end of the thermocouple 84 is electrically connected to the electromagnetic valve coil 82. The magnetic attraction member 83 is slidingly arranged on the valve body 81. The first electric contact 85 is arranged on the magnetic attraction member 83. The second electric contact 86 is arranged on the valve body 81 or the electromagnetic valve coil 82. The first electric contact 85 and the second electric contact 86 are respectively connected to two ends of the control circuit 6. The extension end of the electric push rod 88 is arranged opposite to the magnetic attraction member 83, so that when the extension end is extended, the magnetic attraction member 83 is pushed to move towards the electromagnetic valve coil 82, so that the first electric contact 85 and the second electric contact 86 are in conductive contact, thereby connecting the control circuit 6. The elastic reset member 87 is arranged between the valve body 81 and the magnetic attraction member 83. When the magnetic force of the electromagnetic valve coil 82 disappears, the elastic force of the elastic reset member 87 can separate the first electric contact 85 and the second electric contact 86, thereby cutting off the control circuit 6. The elastic reset member 87 is a compression spring.

[0024] Please refer to Figure 3 As shown, the flameout power-off protection device 8 further comprises an execution circuit 89, which is electrically connected to the electric push rod 88. The execution circuit 89 comprises a time relay 891 and a start switch 892. The time relay 891 controls the on-off time of the execution circuit 89. When the start switch 892 is pressed to start the execution circuit 89, the extension end of the electric push rod 88 is extended, thereby pushing the magnetic attraction member 83 to move towards the electromagnetic valve coil 82, and at the same time, the time relay 891 starts timing. When the timing of the time relay 891 ends, the execution circuit 89 is powered off, and the extension end of the electric push rod 88 is away from the magnetic attraction member 83. By arranging the time relay 891, the on-time of the electric push rod 88 can be controlled. After power-off, the magnetic attraction member 83 is only subjected to the magnetic attraction force of the electromagnetic valve coil 82 and the elastic restoring force of the elastic reset member 87. Therefore, when the flame is extinguished, the magnetic attraction force disappears, and the elastic force of the elastic reset member 87 can be used to cut off the control circuit 6.

[0025] Please refer to Figure 2 and Figure 4As shown, the flameout power-off protection device 8 further comprises an induction wire 810, which is arranged in the combustion zone and connected with the temperature induction probe 841 of the thermocouple 84. By arranging the induction wire 810, the sensitivity of the temperature induction probe 841 to the flame is higher, the detection capability is stronger, and the work is more stable, thereby ensuring the judgment of the flameout. The induction wire 810 is a spiral spring. In this way, sufficient elastic space can be provided when the induction wire 810 is spirally wound, the installation is more flexible, the extended length is greater, the service life is longer, and the accuracy is higher. Specifically, the induction wire 810 is arranged in a spiral structure around the combustion zone. Since the flame may swing during combustion, the detection range of the temperature induction probe 841 is limited, which may affect the detection result. Therefore, by arranging the induction wire 810 in a spiral structure, the detection range of the temperature induction probe 841 can be further increased, and the detection accuracy can be ensured. The induction wire 810 is made of nickel or nickel alloy material.

[0026] Please refer to Figure 1 and Figure 3 As shown, the vegetable oil fuel stove 100 further comprises a flow control valve 9 arranged in the fuel channel 3 and electrically connected with the control circuit 6. By arranging the flow control valve 9, the flow of the fuel can be controlled, thereby controlling the fuel ejection amount of the nozzle 4, achieving the purpose of controlling the fire size, and improving the convenience of use.

[0027] Please refer to Figure 1 and Figure 3 As shown, the vegetable oil fuel stove 100 further comprises a gas supply device 10, the output end of the gas supply device 10 being communicated with the nozzle 4 to blow out the fuel in the nozzle 4. High-pressure air containing oxygen enters the inside of the nozzle 4 from the gas port of the nozzle 4, mixes with the fuel entering from the oil port of the nozzle 4, and is sprayed from the spray port of the nozzle 4 into the inside of the furnace body 11, thereby making the fuel easier to burn. The gas supply device 10 comprises a gas pump and a gas valve, the output end of the gas pump being connected with the input end of the gas valve, and the input end of the gas pump being communicated with the outside. The output end of the gas valve is connected with the nozzle and electrically connected with the control circuit to control the gas amount sprayed to the nozzle. Of course, the gas supply device can also adopt a mode of directly connecting the gas pump with the nozzle for gas supply.

[0028] In combination with the above description and the above drawings, the working principle of the vegetable oil fuel stove 100 of the present application will be described in detail as follows:

[0029] When the plant oil fuel stove 100 is needed to be used, the start switch 892 is pressed, the execution circuit 89 is powered on, and the time relay 891 starts timing. At this time, the electric push rod 88 is powered on, and the execution circuit 89 controls the electric push rod 88 to make the telescopic end of the electric push rod 88 extend. At this time, the telescopic end of the electric push rod 88 pushes the magnetic attraction piece 83, so that the magnetic attraction piece 83 moves towards the electromagnetic valve coil 82. Finally, the first electric contact 85 and the second electric contact 86 are in electrical contact, and the control circuit 6 is powered on. After the control circuit 6 is powered on, the electromagnetic valve switch 7 is turned on and the fuel channel 3 is opened, and the fuel in the fuel tank 2 flows to the spray head 4 through the fuel channel 3. At the same time, the control circuit controls the air pump, ignition and flow control valve 9 to be in the powered-on state. Specifically, the air pump is started to blow air to the spray head 4, so that the fuel in the spray head 4 mixes with air and is sprayed from the spray head 4 into the furnace body 11. At this time, only the button of the igniter 5 needs to be operated to make the igniter 5 generate sparks, so that the sparks ignite the mixed combustible gas in the furnace body 11, so that the spray head 4 generates flame combustion. By controlling the flow control valve 9, the spray head 4 continuously sprays fuel to realize continuous combustion. In the initial stage of flame combustion, the flame heats the sensing wire 810, and after the sensing wire 810 detects the flame, an electric current is generated in the thermocouple 84, which makes the electromagnetic valve coil 82 generate a magnetic field. The magnetic field generates an attractive force on the magnetic attraction piece 83, which is greater than the elastic restoring force of the elastic reset piece 87, so that the magnetic attraction piece 83 can be continuously attracted by the electromagnetic valve coil 82, so that the control circuit 6 remains conductive, thereby making the electromagnetic valve switch 7, the air pump and other execution elements continuously work.

[0030] When the time relay 891 finishes timing (usually set to 60 seconds), the time relay 891 cuts off the execution circuit 89, at this time, the telescopic end of the electric push rod 88 retracts and leaves the magnetic attraction piece 83, and since the electromagnetic valve coil 82 continuously attracts the magnetic attraction piece 83 at this time, the flame in the furnace body 11 can still continuously burn. However, when the flame is accidentally extinguished, the sensing wire 810 cools, the thermocouple 84 cannot generate current, so that the magnetic field of the electromagnetic valve coil 82 disappears, at this time, the magnetic attraction piece 83 is away from the electromagnetic valve coil 82 under the elastic force of the elastic reset piece 87, at this time, the first electric contact 85 and the second electric contact 86 are separated, so that the control circuit 6 is powered off. Therefore, the electromagnetic valve switch 7, the air pump, the igniter 5 and the flow control valve 9 and other execution elements stop working. The electromagnetic valve switch 7 will close the fuel channel 3 again, so that the fuel cannot be sent to the spray head 4, and the spray head 4 cannot spray combustible gas to the furnace body 11, so that the accident of toxic gas leakage in the furnace body 11 does not occur, and each electrical equipment is in a power-off state, the power is saved, and the safety of use is greatly improved.

[0031] The utility model discloses a magnetic attraction piece 83 is slidably arranged in the valve body 81 through setting the electromagnetic valve coil 82 in the valve body 81, and the thermocouple 84 is set, one end of the thermocouple 84 is used to detect temperature, so that the electromagnetic valve coil 82 can produce the magnetic field that attracts the magnetic attraction piece 83 by the thermocouple 84, the first electric contact 85 and the second electric contact 86 are arranged on the magnetic attraction piece 83 and the electromagnetic valve coil 82 or the valve body 81, the first electric contact 85 and the second electric contact 86 are connected with control circuit 6, so that when starting, the magnetic attraction piece 83 is moved by the electric push rod 88, so that the first electric contact 85 and the second electric contact 86 contact, so that the control circuit 6 can be turned on, and the purpose of igniting and controlling fuel delivery by control circuit 6 is achieved. When the thermocouple 84 generates current by heating, the magnetic attraction piece 83 is attracted by the electromagnetic valve coil and makes the first electric contact 85 and the second electric contact 86 keep contact, so that the control circuit 6 can be continuously turned on, and the flame can continuously burn. Conversely, when the flame is accidentally extinguished, the thermocouple 84 cools, the magnetic attraction piece 83 is pushed away from the electromagnetic valve coil 82 by the elastic reset piece 87, so that the first electric contact 85 and the second electric contact 86 are separated, and the purpose of cutting off the control circuit 6 is realized. Therefore, the scheme can automatically disconnect the power supply after accidental extinguishing, prevent the electrical equipment from continuing to work, effectively prolong the service life of the electrical equipment, and improve the safety of electricity.

[0032] The working principles of the control circuit 6 and the execution circuit 89 of the vegetable oil fuel stove 100 are well known to those skilled in the art, and will not be described in detail here.

[0033] The above is only a preferred embodiment of the present application, and of course cannot limit the scope of the present application, so the equivalent changes made according to the patent application scope of the present application still belong to the scope covered by the present application.

Claims

1. A flame failure protection device for shutting down a control circuit, characterized by: The valve body, the solenoid, the magnetic attraction element, the thermocouple, the first electric contact, the second electric contact, the elastic reset element and the electric push rod, the solenoid is arranged on the valve body, one end of the thermocouple is a temperature sensing probe, the other end of the thermocouple is electrically connected to the solenoid; the magnetic attraction element is arranged on the valve body, the first electric contact is arranged on the magnetic attraction element, the second electric contact is arranged on the valve body or the solenoid, the first electric contact and the second electric contact are respectively connected to two ends of the control circuit; the telescopic end of the electric push rod is arranged opposite to the magnetic attraction element to push the magnetic attraction element to move to make the first electric contact and the second electric contact conductive contact, thereby connecting the control circuit; the elastic reset element is arranged between the valve body and the magnetic attraction element to separate the first electric contact and the second electric contact, thereby cutting off the control circuit.

2. The flameout protection device of claim 1, wherein: The flameout power-off protection device further comprises an execution circuit electrically connected to the electric push rod, the execution circuit comprises a time relay, the time relay controls the on-off time of the execution circuit, and when the execution circuit is powered off, the telescopic end of the electric push rod is away from the magnetic attraction element.

3. The flameout protection device of claim 1, wherein: The flameout power-off protection device further comprises a sensing wire arranged in the combustion zone and connected to the temperature sensing probe of the thermocouple.

4. The flameout protection device of claim 3, wherein: The sensing wire is in a vortex structure and arranged around the combustion zone.

5. The flameout protection device of claim 3, wherein: The sensing wire is a spiral spring.

6. Flame failure protection device according to any one of claims 3 to 5, characterized in that The sensing wire is made of nickel or nickel alloy material.

7. A plant oil fuel stove characterized by: The stove body, the fuel tank, the fuel channel, the spray head, the igniter, the control circuit, the electromagnetic valve switch and the flameout power-off protection device of any one of claims 1 to 6 are arranged on the stove body, the stove body is provided with a stove body, the spray head is arranged at the bottom of the stove body, the spray head is connected to one end of the fuel channel, the other end of the fuel channel is connected to the fuel tank; the fuel tank is arranged on the stove body, the igniter is arranged on one side of the stove body and close to the spray head; the igniter is electrically connected to the control circuit; the electromagnetic valve switch is arranged on the fuel channel to control the on-off of the fuel channel, the electromagnetic valve switch is electrically connected to the control circuit; the flameout power-off protection device is arranged on the control circuit, and the temperature sensing probe of the thermocouple is arranged in the stove body and close to the spray head.

8. The plant oil fuel burner of claim 7, wherein: The plant oil fuel stove further comprises a flow control valve arranged on the fuel channel.

9. The plant oil fuel burner of claim 7, wherein: The plant oil fuel stove further comprises a gas supply device, and the output end of the gas supply device is communicated with the spray head to blow out the fuel in the spray head.

10. The plant oil fuel burner of claim 7, wherein: The horizontal height of the fuel tank is greater than the horizontal height of the spray head.

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